(1) Except upon approval of the board, all nonchampionship contests or exhibitions of mixed martial arts must not exceed three rounds in duration.

(2) A championship contest or exhibition must be five rounds in duration.

(3) A period of unarmed combat in a contest or exhibition of mixed martial arts must be five minutes in duration. A period of rest following a period of unarmed combat in a contest or exhibition of mixed martial arts must be one minute in duration.